Bathtub



FIG. 1 is a rear view of a bathtub showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is an isometric view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a trimetric view thereof.

The broken line showing the remainder of the bathtub is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a bathtub, as shown and described. 